。556 北京科技大学学报 第31卷 tion of ammonia ritrogen by modified natural zeolite.J South 染治理技术与设备，2006.7(3)：75) China Univ Technol.2007.35(4):6 [12 Wang LJ.Lin C M.Research progress of nitrogen and phos (李忠。符瞰，夏启斌.改性天然沸石的制备及对氨氮的吸附 phorus removal from w ater by modified zeolite.J Anhui Agric 华南理工大学学报，2007.35(4)：6 Sci,2007.35(20):6207 [10 Kirik S D.Dubkov A A.Dubkova S A.et al.X-ray pow der (王黎瑾，林春绵。改性沸石净化水中氮磷的研究进展。安徽 diffraction and t.p.d.study of S02 adsorption on type Y zeolite. 农业科学2007.35(20)：6207 Zeolites.1992.(12):292 13]Ding W M.Huang X.Zhang L P.Removal of phosphonus from [1l]Ren G,Cui F Y.Study of modified zeolite to remove ammonia aqueous soution by lant hanum hydrate.Environ Sci,2003.24 nitrogen in w ater.Tech Equip Environ Pollut Control,2006. (5):110 7(3):75 (丁文明.，黄霞，张力平.水合氧化镧吸附除磷的实验研究 (任刚，崔福义.改性天然沸石去除水中氨氮的研究.环境污 环境科学，2003.245)：110) (上接第536页) (向鹏程，谢英亮.应用盈亏平衡分析法确定低品位矿利用的 [3]Chang W S,Sun L M.Hao Q M.Application of the delimitation 临界品位.治金矿山设计与建设，2001,23(6)：24) method of dynamic cconomic mining boundary to the mining of I8 Chen S R.Calculating the cassdifferenceg rade of Hetai gold low grade one body of Fankou lead-zinc mine.Gold,2003. mine by reverse deduction method.South fron Steel.2000, 245):19 1146):18 (畅文生，孙立明，郝全明.动态经济开采边界圈定方法在凡口 (陈少荣.用倒推方法计算河台金矿级差品位.南方钢铁， 铅锌矿低品位矿体开采中的应用.黄金，2003.245)：19， 2000.1146):18) [4]Xu T.Optimum intensification of reserves devdlopment.Nat Re- [9 Zhou LS.The Acoount and application of the g radation quality in sour Econ China,2004,7(12):4 gold one.Gold Sci Tech nol,1998.6(4):45 (徐煮.矿量开发最佳集约化程度优选研究.中国国土资源经 (周龙寿.黄金矿山级差品位的计算与应用.黄金科学技术， 济，2004.7(12)：4) 1998.6(4):45) [5]Osanloo M.Ataei M.Using equivalent grade factors to find the [10 WuZ L.Fu Q.Wang L.Using differential grade index to carry optimum cut-off grades.Miner Eng,2003,16(2):771 out dynamic appraisal of mine production.Gold,2000,21(8): [6]Jiang S H,Li D B.Decision for mining and dressing of low-grade 28 ores by breakeven gmdes.Jiangxi Nonferrous Met,2006. (吴忠良，付强，王林.应用级差品位指标动态评价矿山生产 20(1):22 过程.黄金.2000.21〔8)：28) (江四海，李德斌.运用盈亏平衡品位进行低品位矿采选决策. [11]Zhang B R.Sun L N.An approach to the grade difference index 江西有色金属，2006201)：22) of gold mines.JShenyang Ins Gold Technol,1995,14(2):125 【7刃Xiang PC,Xie Y L.Determining critical gra止of low grade ore (张宝仁，孙丽娜.岩金矿山级差品位指标的探讨.沈阳黄金学 utilization by break even analysis.Met Mine Des Constr,2001. 院学报.1995.142)：125) 23(6:24tion of ammonia nitrogen by modified natural zeolit e.J South China Uni v Technol, 2007, 35( 4) :6 ( 李忠, 符瞰, 夏启斌.改性天然沸石的制备及对氨氮的吸附. 华南理工大学学报, 2007, 35( 4) :6) [ 10] Kirik S D, Dubkov A A, Dubkova S A, et al.X-ray pow der diffraction and t.p.d.study of SO2 adsorption on type Y zeolit e. Zeolites, 1992, ( 12) :292 [ 11] Ren G, Cui F Y.Study of modified zeolit e t o remove ammonia nitrogen in w ater.Tech Equip En viron Pollut Control, 2006, 7( 3) :75 ( 任刚, 崔福义.改性天然沸石去除水中氨氮的研究.环境污 染治理技术与设备, 2006, 7( 3) :75) [ 12] Wang L J, Lin C M .Research progress of nitrogen and phos￾phorus removal from w ater by modified zeolite.J Anhu i Agric S ci, 2007, 35( 20) :6207 ( 王黎瑾, 林春绵.改性沸石净化水中氮磷的研究进展.安徽 农业科学, 2007, 35( 20) :6207) [ 13] Ding W M, Huang X, Zhang L P.Removal of phosphorus from aqueous solution by lanthanum hydrate.E nviron S ci, 2003, 24 ( 5) :110 ( 丁文明, 黄霞, 张力平.水合氧化镧吸附除磷的实验研究. 环境科学, 2003, 24( 5) :110) ( 上接第 536 页) [ 3] Chang W S, S un L M, Hao Q M .Application of the delimit ation method of dynamic economi c mining boundary t o the mining of low grade ore body of Fankou lead-zinc mine.Gold , 2003, 24( 5) :19 ( 畅文生, 孙立明, 郝全明.动态经济开采边界圈定方法在凡口 铅锌矿低品位矿体开采中的应用.黄金, 2003, 24(5) :19) [ 4] Xu T .Optimum intensification of reserves development .Nat Re￾sour Econ Ch ina , 2004, 7( 12) :4 ( 徐焘.矿量开发最佳集约化程度优选研究.中国国土资源经 济, 2004, 7( 12) :4) [ 5] Osanloo M, Ataei M .Using equivalent grade f act ors t o find the optimum cut-off g rades.Miner E ng, 2003, 16( 2) :771 [ 6] Jiang S H, Li D B .Decision for mining and dressing of low-grade ores by breakeven grades.Jiangxi Non ferrous Met, 2006, 20( 1) :22 ( 江四海, 李德斌.运用盈亏平衡品位进行低品位矿采选决策. 江西有色金属, 2006, 20( 1) :22) [ 7] Xiang P C , Xie Y L .Determining criti cal grade of low grade ore utilization by b reak even analysis.Met Mine Des Constr, 2001, 23( 6) :24 ( 向鹏程, 谢英亮.应用盈亏平衡分析法确定低品位矿利用的 临界品位.冶金矿山设计与建设, 2001, 23( 6) :24) [ 8] Chen S R.Calculating the class-diff erence-g rade of Het ai gold mine by reverse deduction method.South Iron S teel, 2000, 114( 6) :18 ( 陈少荣.用倒推方法计算河台金矿级差品位.南方钢铁, 2000, 114( 6) :18) [ 9] Zhou L S .The Accoun t and application of the g radation quality in gold ore .Gold Sci Tech nol, 1998, 6( 4) :45 (周龙寿.黄金矿山级差品位的计算与应用.黄金科学技术, 1998, 6( 4) :45) [ 10] Wu Z L, Fu Q, Wang L .Using diff erential grade index t o carry out dynamic appraisal of mine production.Gold , 2000, 21( 8 ) : 28 ( 吴忠良, 付强, 王林.应用级差品位指标动态评价矿山生产 过程.黄金, 2000, 21(8) :28) [ 11] Zhang B R, Sun L N .An approach t o the grade difference index of gold mines.J Shenyang Inst Gold Technol, 1995, 14( 2) :125 ( 张宝仁, 孙丽娜.岩金矿山级差品位指标的探讨.沈阳黄金学 院学报, 1995, 14( 2) :125) · 556 · 北 京 科 技 大 学 学 报 第 31 卷